A case report of severe recurrent varicella in an ankylosing spondylitis patient treated with adalimumab – a new side effect after 15 years of usage
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Tumor necrosis factor-α (TNF-α) antagonists, most of which are monoclonal antibodies, became a widespread treatment for autoimmune diseases such as rheumatoid arthritis, ankylosing spondylitis, inflammatory bowel diseases, psoriasis, psoriatic arthritis, hidradenitis suppurativa and uveitis. Their use is based on the blockage of TNF-α, which plays an important role in granulomas formation, development of phagosomes, activation and differentiation of macrophages, immune response against viral pathogens. The multiple adverse effects of TNF-α inhibition have been identified, including a two-to four-fold increased risk of active tuberculosis and other granulomatous conditions and an increased occurrence of some other serious bacterial, fungal and certain viral infections.
A 34-year-old male patient with disseminated varicella and pneumonitis was admitted to our hospital. The diagnosis of varicella was established serologically by enzyme immunoassay (EIA) and by polymerase chain reaction confirmation of the virus in vesicular fluid. The patient has been receiving adalimumab and methotrexate for the last 3 years due to ankylosing spondylitis and was seropositive to varicella zoster virus prior to the introduction of TNF-α antagonists. Acyclovir was administered for 10 days with the resolution of clinical illness and radiological signs of pneumonitis.
Due to the use of biological agents, particularly TNF-α inhibitors, as a well-established therapy for some autoimmune diseases, new potential adverse events can be expected in the future and we wanted to point out one of them. To our knowledge this is the first case of recurrent disseminated varicella in a patient taking TNF-α antagonists.
KeywordsAdalimumab Varicella virus Severe recurrent infection Pneumonia Case report
Enzyme immunoassay test
tumor necrosis factor-α
Tumor necrosis factor-α (TNF-α) antagonists, most of which are monoclonal antibodies (infliximab, golimumab, adalimumab), became a widespread treatment for autoimmune diseases such as rheumatoid arthritis, ankylosing spondylitis, inflammatory bowel diseases, psoriasis, psoriatic arthritis, hidradenitis suppurativa and uveitis. Their use is based on the blockage of TNF-α, which plays an important role in granulomas formation, development of phagosomes, activation and differentiation of macrophages, immune response against viral pathogens [1, 2, 3]. Adalimumab is a recombinant human immunoglobulin (Ig) G monoclonal antibody specific for human TNF-α which causes modulation of the inflammatory response activated by this cytokine.
However, multiple adverse effects of TNF-α inhibition have been identified, including a two-to four-fold increased risk of active tuberculosis and other granulomatous conditions and an increased occurrence of some other serious bacterial, fungal and certain viral infections [4, 5, 6].
We report a case of a 34-year-old patient with a medical history of fever, malaise, cough, and generalized vesicular rash that started 1 day before admission. 14 days prior to disease onset, the patient’s son developed chickenpox. The patient had a history of ankylosing spondylitis and has been treated with adalimumab 40 mg subcutaneously biweekly in addition to methotrexate10 mg per week for the last 2 years. He had had chickenpox at the age of 5, and positive IgG antibodies (titre 24; positive > 11) to varicella-zoster virus (VZV) using EIA in 2014, prior to the initiation of adalimumab treatment.
Discussion and conclusions
Patients receiving TNF-α antagonists therapy remain at a selectively increased risk for more severe primary varicella infections compared with the general population, with the estimated incidence rate of hospitalization due to chickenpox of 26 cases per 100,000 (95% CI 10–69) compared with the expected rate of 1.9 (95% CI 1.8–2.0) in the general population . Contradictory results have been published reporting the association between TNF-α therapy and herpes zoster.
Several large population-based studies have been conducted, with those performed in the United States not finding an increased risk with TNF-α inhibitors, contrary to those in Europe generally showing an increased risk [4, 8, 9]. There were multiple reports of severe and disseminated herpes zoster and primary varicella associated with TNF-α therapy (infliximab and adalimumab) [1, 10, 11, 12, 13, 14, 15]. In contrast, recurrent varicella infections during TNF-α therapy were rarely reported, with only one case featuring few clinical symptoms (no dissemination and resolution of skin lesions without antiviral treatment) in the course of etanercept administration . VZV causes two clinically distinct diseases - primary infection resulting in varicella and herpes zoster resulting from the reactivation of latent VZV that gained access to sensory ganglia during varicella . It is traditionally considered that VZV infection provides lifelong immunity but recurrent infection (also referred to as reinfection or second varicella infection) with VZV occur more commonly than previously thought [18, 19]. In an active surveillance initiative in California, the percentage of patients diagnosed with varicella who reported previous varicella infections ranged from 4.5 to 13.3% . VZV recurrent infection can occur even in immunocompetent patients, and our patient was predisposed to infection by his rheumatologic disease and immunosuppressive therapy. Patients with a history of underlying malignancy, steroid use or immunosuppressive therapy, HIV infection, or solid organ transplantation are susceptible for disseminated varicella due to impaired cellular immunity. Clinical manifestations in the immunosuppressed host can include atypical and severe manifestations such as development of crops of vesicles over weeks, large and haemorrhagic skin lesions, pneumonia, or widespread disease with disseminated intravascular coagulation [17, 20]. The antiviral therapy is recommended for immunocompromised hosts who present with varicella because they are at risk for developing disseminated varicella, as our patient has been, and can also experience more frequent severe morbidity and higher mortality rates compared with immunocompetent hosts [20, 21]. Early clinical recognition of VZV infection in high risk patients, such are all immunocompromised patients, as well as laboratory detection and confirmation of VZV require early aggressive antiviral treatment leading to favourable clinical outcome [7, 17, 20].
Due to the use of biological agents, particularly TNF-α inhibitors, as a well-established therapy for some autoimmune diseases, new potential adverse events can be expected in the future and we wanted to point out one of them. To the best of our knowledge, this is the first case of confirmed recurrent varicella with disseminated disease and pneumonia in a patient receiving adalimumab since this drug has been approved for use in 2002 in the United States and 2003 in the European Union [22, 23].
Availability of data and materials
TS, AA, MA, JP, AS and DV were involved in the clinical management of this case. TS drafted the original manuscript under the guidance of DV and AS. All authors read and approved the final manuscript.
Ethics approval and consent to participate
Consent for publication
Written informed consent was obtained from the patient for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor of this journal, upon request.
The authors declare that they have no competing interests.
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